Text as I see now. I am not really an excel guru, but on the options "Cellcharacteristics" there is no option I can find for Boolean. I found on the internet how to get a checkbox, but that is so much work for this file to add it on every cell. There should be a much easier way.

If you have an Excel Sheet that's created in e.g. English, and it has TRUE and FALSE, and you open it in e.g. Dutch it will read WAAR and ONWAAR, and vice versa. But if you manually type the values, you must use the ones for the language Excel is installed in. If you're not sure what to use, a trick is to put the value "1" in A1, and have a formula in A2 that says "=A1=1" and in A3 "=A1=0", and you'll have the values for TRUE and FALSE :).